Device for indicating the number of revolutions of rotating machine elements



Aug- 3 1926. I 1,594,749

V. J. ODHNER DEVICE FOR INDICATING THE NUMBER OF REVOLUTIONS 0F ROTATINGMACHINE ELEMENTS Filed July 5. 1922 2 Sheets-Sheet 1 Aug. 3 1926.1,594,749

V. J. ODHNER DEVICE FOR INDICATING THE NUMBER OF REVOLUTIONS 0F ROTATINGMACHINE ELEMENTS Filed July 5. 1922 2 Sheets-Sheet 2 I J L J PatentedAug. 3, 1926.

UNITED STATES PATENT OFFICE.

VALENTIN JAKOB ODHNER, OF STOCKHOLM, SWEDEN.

mwxcnroa mnxca'rme THE NUMBER or REVOLUTIONS or no'rn'rms MACHINE,ELEMENTS.

Application fled July 8, 1922, Serial No. 572,571, and in Sweden .Iuly15, 1921.

known transmitted to other indicating discs I l of higher value by meansof a device located at the side of the, discs, said device generally.consisting of a pin or the like rigidly connected with the respectiveindicating disc, said pin when the indicating disc in question is turnedfrom 0 to 9 or from 9 to 0, engaging and turning a gear wheel connectedwith the indicating disc of nearest higher value, so that the latterdisc is shifted one step and so on. Said device I for transmitting themovement is however less satisfactory especially when calculatingoperations arecarried out with a great number of indicating discs whichare kept in their fixed positions by means of spring-actuated pawls, asthe shifting of the indicatingto the present invention a member whichcooperates with the indicating discs and which is arranged in such a wayas to. take over and independently carry out the transmission of themovement (which is started in the known way) from one indicating disc toanother of higher value is connected with or made integral with abovementioned member which transmits the movement the shaft or'the like.

A calculating device according to the present invention is shown in'theaccompanying drawings. Fig. 1 is a front-view of the device and Fig. 2is a part sectional view on the"line AA'in Fig. 1. Fig. 3 is a similarview as Fig. 2 showing the parts in another position. Fig. 4 is afront-view of a modified arrangement of the indicating discs withassociated parts. Fig. 5 is a part sectionalview of the device on theline BB in Fig. 4. Figs. 6 and 7 show a modification of one of the partsof the device. :Figs. 8 and 9 are diagrammatic views of the device asapplied to a calculating machine. I s

The calculating device consists of a number of indicating discs 2,rotatably mounted on a shaftl, only four of said indicating discs beingshown in the drawing. A gear wheel 3 is as usual rigidly connected witheach one of the indicating discs, aspring-actuated pawl, Figure 2,engaging said gear wheel in the known way. According to Figs. 13 eachindicating disc is furthermore provided with a projection or the like 4,which is adapted to cooperate with a rotatable, toothed wheel v5 or thelike when the indicating disc is turned from O to 9 or from disc. Thetoothed wheels 5 and corresponding gear wheels 6 are mounted on a shaft7 parallel with the shaft 1. One of the gear wheels 6 cooperates asusually with a member 8 formed as an arm or thelikewhich is connectedwith the rotating shaft and which transmits themovement of the latter.

Said arm is mounted on a rotatable shaft 9, which by means of a gearing,not shown in the drawings, is connected withjthe shaft or the like,therevolutions of which are to be counted. The shaft is provided withanumber of spirally mounted projections 10, 11, 12 which in their properturns co operate with the toothed wheels of the indicating discs ofhigher value and which according to the drawings consist of radial teethor arms. As shown in Fig. 2' said teeth are mounted two by two on theshaft 9 so that one of the teeth is brought into operation, when theshaft is rotating in the one direction and the other tooth operates whenthe shaft is rotating in opposite direction. i 1 v When the movement ofthe rotating shaft by means of the gearing is transferred to the shaft 9the arm 8 engages and turns the gear wheel 6 and thereby theunits-indicating d sc 2 one step for each revolution of the shaft 9.According to the position the transmission of the movement startedby thepin and turns the toothed wheel and the indicating disc in question theremaining part of the step, so that the figure 1 will be visible in theopening at the tensindicating disc, and the figure O in the-opening atthe units-indicating disc. After the toothed wheel 5 which at this timewill be located again in the engaging position shown in Fig. 2"for theprojection 4 on the units-indicating disc has been turned in the abovedescribed way eight more steps by said projection and the tooth lO-sothat the figure 9 will be visible in the opening at the tens-indicatingdisc, the projection on the latter will engage the next toothed wheeland turn the latter about half a step into engaging position for thetooth 11 which thereupon turns the wheel with the hundreds-indicatingdisc the remaining part of the step. and so on. When. the projection 1during the turning of the shaft 9 in the opposite direction turns thetoothed wheel 5 in the same way about half a step said wheel will bebrought into engaging position for the other tooth 10. which turns thewheel and corresponding indicating disc the remaining part of the stepand so on. The teeth 10, 11, 12 have such avlength as to pass respectivetoothed wheel 5. without hindrance when the shaft 9 is turned, exceptwhen said wheel in the above described way has been brought intoengaging position for respective tooth on the shaft 9 by the projection1 cooperating with the wheel 5. lVhcn the shaft 9 occupies the normalposition-shown in Fig. 2 the toothed wheels 5 can be turned withouthindrance by the teeth 10, 11. 12 and the projections i when theindicating, discs are returned to the zeroposition.

According to Figs. 4; and 5 the shaft 1 supporting the indicating discs2' is located nearest to the shaft 9, so, that the arm 8' cooperatesdirectly with the gear wheel 3' of the units-indicating disc. In thiscase the toothed wheels 5 are fixedly connected with the indicatingdiscs and the projection 1 cooperating with respective toothed wheel ismade integral with the gear wheel 6 on the shaft 7. lVhen the arm 8' bymeans of the gear wheel 3 turns the unitsindicating disc from 9 to 0 (orinop posite direction from 0 to 9) the projection 4 engages the toothedwheel 5 of the tens-indieating disc and turns said wheel about halfastep into engaging position for the tooth 10 which thereupon turns thetoothed wheel and the indicating disc the remaining part of the step andso on. The shaft 9 is also provided with teeth 11 and 12'.

According to the embodiment shown in Figs. 6 and 7' a disc 13 issubstituted for each pair of teeth 10, 11, 12 on the shaft 9, which discis provided with a recess 14 extending from its periphery, the twolimiting surfaces 15, 16 of said recess constituting stops cooperatingwith the toothed wheel 5 of respective indicating disc, the mutual.distance and position on the shaft 9 of the said stops corresponding tothose of the teeth. Each one of the discs 13 is furthermore providedvwith another recess 17, which in the shown, inactive position of therollis located at respective toothed wheel 5, sothat the latter. can beturned without hindrance when the indicating discs are returned to thezeroposition, After the toothed wheel is moved; into engaging positionfor the disc 13 by means of the projection 1 in the above described waythe stop 15 (or 16) turnsthe toothed wheel the rest of the step startedby means of said projection. The peripherie edge 18 of the disc preventsthe toothed wheel, from being turned any more than to the desired.position.

Figs. 8 and 9 are schematic views of the device as applied to acalculating machine, the frame member 19 which supports the shafts 1"and 7 being movable step by step relatively to the member 20 whichsupports the shaft 9 in such a way that the arm 8' cancooperate with thegear wheels3' of the.

tens, hundreds, etc., indicating discs-during the calculatingoperations;

W'henthe indicating discs are returned to the zero-position which isdone in the ordinary way no movement can be transferred from indicatingdiscs of higher value to.incheating discs of lower value.

It is to be understood thatthe device can be modified in severalrespects without departing from the scope of the invention.

Having now described my invention, what I claim as'new and desire tovsecure by Letters Patent is A transfer mechanism for the revolutionscounters for the pin wheels in calculating machines of the pin wheel andcam disc type, having a plurality of rotatable numeral wheels, themotion being transferred from the pin wheels to one of them by a memberconnected with'the'pin wheels. and partaking in the motion of same, themotion being then transferred to the numeral wheels of higher value by arotatable element provided with projections fast therewithv andcooperating with said numeral wheels and acting in both directions ofmovementof the said rotatable element and adapted to take up and finishthe transfer movement already this element partakes in the rotation ofthe initiated from on numeral wheel to another member transferring themotion from the of higher value, characterized by the mempin wheels. 10her connected with the pin wheels and par- In witness whereof, I havehereunto 5 takin in the motion of same being so cong d my namenecte withthe transfer motion transmitting element provided with the projections,that VALENTIN J AKOB ODHNER.

